[TASK] Replace deprecated doctrine/dbal 'getSchemaManager()'
'doctrine/dbal' 3.x deprecated the 'getSchemaManager()' method in favour of the 'createSchemaManager()' method on connections. This has been aligned in core with the doctrine/dbal raise in #96287. However, two occurances with corresponding todo comments has been overseen. This patch replace the calls and solves the comments of the left-overs. Additionally, unrelated wrapper method in ext:install database checks has aligned to the same name to avoid confusion when looking for the deprecated method. Resolves: #97552 Related: #96287 Releases: main Change-Id: If73e9439acdcbf89db968ba1e6db1c4d60513861 Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74524 Tested-by: core-ci <firstname.lastname@example.org> Tested-by: Benni Mack <email@example.com> Tested-by: Christian Kuhn <firstname.lastname@example.org> Tested-by: Stefan Bürk <email@example.com> Reviewed-by: Benni Mack <firstname.lastname@example.org> Reviewed-by: Oliver Klee <email@example.com> Reviewed-by: Christian Kuhn <firstname.lastname@example.org> Reviewed-by: Stefan Bürk <email@example.com>